Thales theorem triangles exercise.

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

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step-by-step explanation:

answer: hey there,

the answer you are looking for is a..

hope this you!

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4